Replacing engine bag fuel lines?

[martin.vesty]

I’m looking to replace my original main fuel lines in the engine bay and it looks like the Porsche parts aren’t available for the two larger pipes.

As it’s the 2.7 I think the fittings might be different onto the metal pipes coming through to the engine bay?

I’d like to keep original look but I’m open to running them like in some models, up to the bulkhead (longer pipes).

Any good solutions found?

I’ve seen the Koblenz set from D911 but not sure I like a hose/fuel clip on the return pipe!

Also noticed companies like HEL could make up like for like if I knew the fittings on the ends.

Anyone able to share fitting types/sizes needed?

Could I just screw the new fittings into the fittings on the metal pipes that come into the engine bay?

 

[BenEngland]

I’m looking to replace my original main fuel lines in the engine bay and it looks like the Porsche parts aren’t available for the two larger pipes.

As it’s the 2.7 I think the fittings might be different onto the metal pipes coming through to the engine bay?

I’d like to keep original look but I’m open to running them like in some models, up to the bulkhead (longer pipes).

Any good solutions found?

I’ve seen the Koblenz set from D911 but not sure I like a hose/fuel clip on the return pipe!

Also noticed companies like HEL could make up like for like if I knew the fittings on the ends.

Anyone able to share fitting types/sizes needed?

Could I just screw the new fittings into the fittings on the metal pipes that come into the engine bay?

Martin. I believe that the original Porsche flexible fuel lines are 'swaged' onto the metal lines coming from the rear of the car and are joined to the fuel lines underneath the offside front wing.
It looks like the 'Koblenz' set from D911 are joined onto the fuel lines by means of a compression fitting, hence the pipe cutter included in the kit, ( many years ago I ground the swaged fitting off & there was a flared portion on the end of the pipe). To fit the compression fitting you have to cut off the flared portion, hence the pipe cutter. The fact that the return hose is attached by a hose/fuel clip is not a problem as the return line is not under any significant pressure.

 

[BenEngland]

I’m looking to replace my original main fuel lines in the engine bay and it looks like the Porsche parts aren’t available for the two larger pipes.

As it’s the 2.7 I think the fittings might be different onto the metal pipes coming through to the engine bay?

I’d like to keep original look but I’m open to running them like in some models, up to the bulkhead (longer pipes).

Any good solutions found?

I’ve seen the Koblenz set from D911 but not sure I like a hose/fuel clip on the return pipe!

Also noticed companies like HEL could make up like for like if I knew the fittings on the ends.

Anyone able to share fitting types/sizes needed?

Could I just screw the new fittings into the fittings on the metal pipes that come into the engine bay?

Martin. Apologies.
Having just now looked more closely at the photos of your fuel line connectors. Porsche had changed the design on later models, ( my car is an 88 Turbo),
The connection to the main fuel lines appears to be a straight forward screw conector as against a swaged connection to the flexible pipe. Aftermarket versions should be readily available. Connections are probably 'AN' style Have you tried Rose Passion ?. ( European Supplier).

 

[martin.vesty]

Martin. Apologies.
Having just now looked more closely at the photos of your fuel line connectors. Porsche had changed the design on later models, ( my car is an 88 Turbo),
The connection to the main fuel lines appears to be a straight forward screw conector as against a swaged connection to the flexible pipe. Aftermarket versions should be readily available. Connections are probably 'AN' style Have you tried Rose Passion ?. ( European Supplier).

Thanks Ben. This makes sense having looked at Euro parts diagrams in detail previously.

 

[blade7]

Like a lot of people I've bought the Rennbay kit from the US. It works, but to be honest I wasn't that impressed with the compression joints that connect to the cut main fuel lines. If I had to do it again, I take the original fuel lines to Pirtek, and see if they could fit new hoses to the 4 original metal screw fittings.

 

[dlknight]

Turbo engine bay fuel lines.

It's probably time I changed at least the supply line. Has anyone used a new Porsche hose that has a threaded coupling on each end, and how much was it?

www.porscheclubgb.com

You can get the fittings from Torques (based in Abergavenny) on eBay, from memory I think you need an 8mm and 10mm compression fitting to 6AN.

You can get the correct fittings for the fuel damper and regulator from ATEC in Brackley.

 

[martin.vesty]

Thanks all.

Waleswood is the place to go it seems. Super helpful & knowledgeable about our cars.
My car is a late chassis and it is after the cut over to hose lines which should not need to be cut to fit compression joints. They are bolt on hoses at all four junctions.
Waleswood also have the "jumper" hose.

 

[dlknight]

I wasn't aware he did short hoses that fitted to the factory hard lines. Can't see them on the website? Is he supplying you some short hoses that attach directly to your factory hard lines?

I was never certain exactly what connector type is used on the factory hard line, it is a metric fitting, but they are impossible to find (to make your own hoses).

FYI - most folks on here have later model chassis (mine is 1990) and used the compression fittings, also by moving the connection to the inner wing it also potentially removes the risk of fuel spraying on the exhaust manifold if the joint was ever to leak.

This was how I did mine last year and I used a longer hose so I could route it around the firewall and away from the exhaust manifolds.

 

[martin.vesty]

I wasn't aware he did short hoses that fitted to the factory hard lines. Can't see them on the website? Is he supplying you some short hoses that attach directly to your factory hard lines?

I was never certain exactly what connector type is used on the factory hard line, it is a metric fitting, but they are impossible to find (to make your own hoses).

FYI - most folks on here have later model chassis (mine is 1990) and used the compression fittings, also by moving the connection to the inner wing it also potentially removes the risk of fuel spraying on the exhaust manifold if the joint was ever to leak.

This was how I did mine last year and I used a longer hose so I could route it around the firewall and away from the exhaust manifolds.

Yes it seems he only lists the S2 version but does get the same for 2.7 made.
I’ve asked him a special favour to see if he can get them sleeved to keep the same look.

I’ll share an update.

 

[BenEngland]

Martin. Who are 'Waleswood', Do you have a link or web address for them ? (tried googling Waleswood & ended up at Waleswood Caravan & Camping Park)

 

[dlknight]

Justin Webb - https://www.944spares.com/

 

[martin.vesty]

PORSCHE 944

store84359304.company.site

 

[scam75]

I've got a Rennbay kit as well. Pipes cut and joined in the inner wing. I found it all to be decent quality and they've sold thousands of them so was happy to go with that.

 

[blade7]

I've got a Rennbay kit as well. Pipes cut and joined in the inner wing. I found it all to be decent quality and they've sold thousands of them so was happy to go with that.

Have they sold thousands, or is it more like hundreds? I've said before that I worked for Gates hydraulics for years. And although hose assembly wasn't my job, I saw enough hose assemblies. And to me the olive in the Rennbay kit is too hard, so I had to pull the joint up pretty hard to prevent leaks.

 

[scam75]

It's a very popular kit and has been on sale for ages and not saw a bad review or failure reported (they may exist, who knows). I can't profess to be an expert on hose assembly but don't recall an issue and I haven't had any leaks. Could be hundreds, could be thousands, just an assumption from me based on the points I've made, definitely shifted a fair few in the states and further afield anyway. Either way it seems a well made, popular, reliable piece of kit.